Hey I have two holset h1c off a 91 and 92 CTD 12valve and I am wonderin where I can run the numbers on them to find the specs for these two turbos. Have searched thru all the threads I could find about 1st gens and holsets but havent really found any good sites to run these numbers. Any suggestions? Thanks

 

Does this help you?

https://www.dieseltruckresource.com/...n-t275521.html

 

Is the 91 turbo off a Non i/c truck or Intercooled truck?

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Yes the 91 is off a I/C truck. Looked at the link very helpful. I cant believe holset doesnt have a data base on their site with all the assembly, serial and customer numbers put together to tell you exactly what you have. Thank gosh there is this site!!!

 

They're both the exact same turbo then except the 92 turbo may have a 21cm exhaust housing, should be cast into the back of the exhaust housing